Ch. 16 Evolution of Populations
| A | B |
|---|---|
| Genetic equilibrium | The situation in which allele frequencies do not change, the population will not evolve. |
| Speciation | Changes lead to the formation of new species. |
| Reproductive isolation | When the members of two populations cannot interbreed and produce fertile offspring. |
When birds Cannot interbreed because they have different mating songs they are characterized by?
When birds cannot interbreed because they have different mating songs, they are characterized by isolation. 10. A situation in which allele frequencies change as a result of the migration of a small subgroup of a population is known as the . 11.
Can we say that interbreeding is another mechanism of evolution?
Gene flow. Another mechanism of evolution may occur during the migration of individuals from one group or location to another. When the migrating individuals interbreed with the new population, they contribute their genes to the gene pool of the local population. This establishes gene flow in the population.
Which reproductive combination produces hybrids?
Which reproductive combination produces hybrids? A hybrid is a cross breed that is produced by reproduction between two individuals belonging to different genera, species, breeds or varieties. Individuals of same species surviving in different geographical locations would not produce hybrids.
What three potential results occur when two species come in contact in the hybrid zone?
Compare and contrast reinforcement, fusion and stability. These are the three possible outcomes of hybrid zones over time.
Where mutations must occur in order for species to evolve?
For mutations to affect an organism’s descendants, they must: 1) occur in cells that produce the next generation, and 2) affect the hereditary material. Ultimately, the interplay between inherited mutations and environmental pressures generates diversity among species.
What must happen for two species to evolve from one?
What must happen for a new species to evolve? Populations must be reproductively isolated from one another.
Which of the following are required for an evolution of a species to occur?
Evolution is a consequence of the interaction of four factors: (1) the potential for a species to increase in number, (2) the genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for an environment’s limited supply of the resources that individuals need in order to …
What is the movement of genes into and out of a gene pool called quizlet?
Gene Flow: The movement of alleles into and out of a gene pool. Migration of an organism into different areas can cause the allelic frequencies of that population to increase.
